I have a 2011 Silverado LT. I need to install a power inverter in it.

In my 2006 there was a spare grommet covering a hole on the drivers side making it very easy to get a 6ga wire out to the battery and still keep the hole sealed.

This 2011 has the battery moved to passenger side engine compartment and I can't find a path into the cab of the truck. I'd prefer not to have to drill a hole in the firewall.

Does anyone know if there is a spare hole or another path into the cab without resorting to drilling a hole in the firewall?